Boiler



Feb. 22 7 V. L. JONES BOILER 2 Sheets-Sheet i Filed July 26. 1923 Inventor.- KimeuiL. fines, b

V. L. JON ES BOILER Filed July 25, 1925 2 Sheets-Sheet 2 Y Inventorm Vincewib. fones,

Patented Feb. 22, 1927.

oairsu STATES;

vinoEN'r L. JONES, or New HAVEN, CONNECTICUT- BOILER.

Application filed. July 2 1923. Serial No, 653,922.

This invention relates to steam generators of the type embodying water tubes set side by side and the particular purpose is .toprovide for the assembly andcombination of a number of such tubes in the generator. 111 such amanner that they will be easy of access for ample I have here illustrated a construction.

providing for the application of mechanical stoker's to such a firebox. i

My invention will, be readily understood by reference to the following description of the. illustrative embodiment thereof taken in connection with the accompanying drawings,

7 wherein Fig. 1 is a rear end elevation of a locomotive firebox;

Fig. 2 is a vertical longitudinal section through the rear portion of the firebox substantially on the line 2- 2 of Fig. 1; and h Fig. 3 is a section on the line 3-3. of Fig. 1.

Beferring'to the drawings, Ifhave there illustrated a form of locomotive boiler of the general type disclosed in the patent to James M. McClellon 1,248,356, Nov. 27,1917, and embodying a firebox having a foundation chamber 3 and a crown chamber5 connected by side walls of stantially in contact and communicating with the crown chamber and the foundation chamber the construction of the sidewalls bein substantially as, disclosed in the patent referred to. I have here illustrated the foundationchamber 3 as in the form o fa hollow Generally circular section but steel castmg of g the former being'formed with openings in which the tubes 7 and the: tubes of the-rear J wall later to be referred toare rolled and beaded and the latter providing for the application tubes. The flat ridges 8 I are conveniently formed in the casting operation at the proper inclination to facilitate the assembly of the parts.

The crown chamber 5 may be of the geneial type disclosed "in the patentreferred to tubes? set side by side sub- V since the rear Wall of the firebox is not subjected to such highheats as the side walls;

8 at the'top and bottom, I

of nlugs 9 opposite the ends of said and comprise a central cylindrical drum 11.

lateral drums13,'the drums having fiattened contacting surfaces and the center drum 11 'seating betweenvthe lateral drums in the manner; of a keystone. The" portions of the drums-which are not in contact are a of cylindrical pressure-resisting form and preferably the drums preserve] this form frontend's, whichare left "'open,'may pass through a suitable flanged opening in the tube sheet17 and be riveted to the-flanges l9 of the latter. Preferably as shown vthethree drums occupy positions substantially tangent'to theinterior of the barrel shell 21, which latter may be provided, as disclosed in the McClellonpatent referred to, with a lower segmental extension 23 defining a combustion chamber and -secured at 25 .to 'the.

sides of the lateral drums and contributing I to the support of the crown chamber.

- The rear wall of the boiler may comprise a series of water tubes 27 and. 27?. preferably of uniform diameter. The tubes 27. and 27' enter thefoundation chamber 3 and the crown drums and have their ends rolled and beaded on the interior of; the same." Since the tubes are of uniform diameter they. may be readily given a suitable curvature as shown so that their. ends may, be presented nor gall-y, that is, perpendicularly, to the parts with which they are connected. The

space between the tubes is closed at the rear of the firebox by suitable. nonconducting ma terial such as fire brick (not'shown). This construction is practicable particularly and/since the alls of large tubes 7 at the 7 side of'the firebox provide for the circulahave nothere .attempted to show the mechanical'stoker as it in itself forms no part of my invention but the construction illustrated is one designed. for use with a socalled Duplex stoker, for further disclosure of which I refer to the Locomotive Gyclopedia (New York), 6th edition, 1922, pages 397 to 402.

The opening 31 in the form of my 'inven tion illustrated is defined by a suitable frame-like hollow header 32 conveniently formed of a single integral casting and providing, as clearly shown by Figs. 2 and 3, a water chamber 33 completely surrounding the opening. This water chamber com municates with the crown chamber and with the foundation chamber 3 by means of tubes 27 a forming a portion of the rear wall. The opening 31 is conveniently formed with a flange 35 exposed at the exterior of the firebox against which the stoker mechanism may seat.

The tubes 27 and 27 considered as a whole provide a rear wall for the firebox and in a sense may be referred to as coplanar tubes although this word obviously is" not used in the strict geometrical sense of the word plane. The significance, however, will be clear. The frame-like header 32 which provides for the application of a stoker is disposed in and forms a portion of this wall. An important feature of my invention provides for the connection of the tubes 27 to this header and in a manner providing for convenient access thereto from the outside or rear of the firebox.

In the form of the invention shown the header 32 has a generally rectangular exterior form and provision is made for connection of tubes thereto along the upper and lower sides and for this purpose opposed walls of the water chamber 33 at the upper and lower parts of the header may extend ina more or less diagonal direction, the sides of the header being laterally directed toward the rearof the firebox, as best shown in Fig. 2. While I have herein referred to these surfaces as diagonal, it is obvious that this word is used in a somewhat generalized sense as the surfaces may be as a whole curvilinear but the direction of the curve at the critical point would be generally substantially diagonal to the general plane of the rear wall of the firebox. As clearly shown in Figs. 2 and 3, the ends of the tubes 27 may be curved so that they are presented normally, that is, perpendicularly,

to the inner or front diagonal wall and may be entered through suitable openings therein and rolled and beaded in these openings. At the opposite wall, that is, the outer or exterior wall which is exposed at the rear of the boiler, provision is made for access to the interior of the water chamber 33 and to the ends of these tubes and this is most conveniently effected by the provision of suitable plugs 37 in this wall directly opposite the ends of the tubes 27*. As is clear from Flgs. 2 and 3, directaccess is thus provided through these plugs to the interiors of the tubes along a smooth curve and by removal of the plugs access is provided to the tubes for cleaning or to the ends of the tubes ings. It will be understood that the partic-' ularity of this description has had for its purpose making amply clear the nature of that particular embodiment and that the construction maybe widely varied from the form shown without departing from the spirit of the invention. The subject matter of invention exemplified by this particular embodiment which I claim as new and desire to secure by Letters Patent I shall express in the following claims.

I claim:

1. In a locomotive firebox comprising a Y crown chamber and a foundation chamber, a back wall comprising tubes curved to enter normally the walls of said chambers, a framedike header defining an opening throughsaid back wall'and having opposed walls disposed substantially diagonally to the back wall as a whole, plugs in the outer of said walls and certain tubes extending from the chambers entered through the opposed wall whereby to provide direct access to thc interior of said tubes from the exterior of the firebox.

2. In a locomotive firebox comprising a crown chamber and a foundation: chamber, a back wall comprising tubes entering said chambers, a frame-like header comprising a single integral casting defining an opening through said back wall and having upper and lower portions presenting exposed sur-, faces at the exterior of the back wall substantially diagonal thereto and having opposed surfaces substantially parallel to the first on the fire side, plugs in the firstof said surfaces and tubes entering through the second opposite the plugs.

In a locomotive firebox comprising a crown chamber and a foundation chamber, a back wall comprising tubes curved to enter normally the walls I of said chambers, a frame-like header defining an opening through said back wall and having rearwardly directed upper and lower portions providing inner walls to rece ve tu s from lift said chambers and opposed Walls through With a series of substantially coplanar tubes a header disposed in said plane and having a portlon provided With Walls diagonal to said plane, tubes being entered through one of the walls, the opposed Wall having provision for access to the ends of saidtubes at the interior of the header.

5. In a steam generator in combination with aseries of tubes a header extending longitudinally of said series and having a laterally directed portion presenting inner and outer Walls substantially diagonal'to said tubes considered as a Whole, the tubes entering the inner Wall and said header havmg provision for access to the interior of the tubes through said outer Wall.

6; In a steam generator in combination With a series of tubes a frame-like header defining an opening transversely of the series of tubes,t11e ends of tubes adjacent the header being bent and entering a Wall there- 'of diagonally and plugs opposite the ends VINCENT L. JoNEs.

signed my 

